1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * xfrm4_state.c
 4 *
 5 * Changes:
 6 * 	YOSHIFUJI Hideaki @USAGI
 7 * 		Split up af-specific portion
 8 *
 9 */
10
 
11#include <net/xfrm.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12
13static struct xfrm_state_afinfo xfrm4_state_afinfo = {
14	.family			= AF_INET,
15	.proto			= IPPROTO_IPIP,
 
 
 
 
 
16	.output			= xfrm4_output,
 
 
 
17	.transport_finish	= xfrm4_transport_finish,
18	.local_error		= xfrm4_local_error,
19};
20
21void __init xfrm4_state_init(void)
22{
23	xfrm_state_register_afinfo(&xfrm4_state_afinfo);
24}

 
  1/*
  2 * xfrm4_state.c
  3 *
  4 * Changes:
  5 * 	YOSHIFUJI Hideaki @USAGI
  6 * 		Split up af-specific portion
  7 *
  8 */
  9
 10#include <net/ip.h>
 11#include <net/xfrm.h>
 12#include <linux/pfkeyv2.h>
 13#include <linux/ipsec.h>
 14#include <linux/netfilter_ipv4.h>
 15#include <linux/export.h>
 16
 17static int xfrm4_init_flags(struct xfrm_state *x)
 18{
 19	if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
 20		x->props.flags |= XFRM_STATE_NOPMTUDISC;
 21	return 0;
 22}
 23
 24static void
 25__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
 26{
 27	const struct flowi4 *fl4 = &fl->u.ip4;
 28
 29	sel->daddr.a4 = fl4->daddr;
 30	sel->saddr.a4 = fl4->saddr;
 31	sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
 32	sel->dport_mask = htons(0xffff);
 33	sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
 34	sel->sport_mask = htons(0xffff);
 35	sel->family = AF_INET;
 36	sel->prefixlen_d = 32;
 37	sel->prefixlen_s = 32;
 38	sel->proto = fl4->flowi4_proto;
 39	sel->ifindex = fl4->flowi4_oif;
 40}
 41
 42static void
 43xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
 44		   const xfrm_address_t *daddr, const xfrm_address_t *saddr)
 45{
 46	x->id = tmpl->id;
 47	if (x->id.daddr.a4 == 0)
 48		x->id.daddr.a4 = daddr->a4;
 49	x->props.saddr = tmpl->saddr;
 50	if (x->props.saddr.a4 == 0)
 51		x->props.saddr.a4 = saddr->a4;
 52	x->props.mode = tmpl->mode;
 53	x->props.reqid = tmpl->reqid;
 54	x->props.family = AF_INET;
 55}
 56
 57int xfrm4_extract_header(struct sk_buff *skb)
 58{
 59	const struct iphdr *iph = ip_hdr(skb);
 60
 61	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
 62	XFRM_MODE_SKB_CB(skb)->id = iph->id;
 63	XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
 64	XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
 65	XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
 66	XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
 67	memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
 68	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
 69
 70	return 0;
 71}
 72
 73static struct xfrm_state_afinfo xfrm4_state_afinfo = {
 74	.family			= AF_INET,
 75	.proto			= IPPROTO_IPIP,
 76	.eth_proto		= htons(ETH_P_IP),
 77	.owner			= THIS_MODULE,
 78	.init_flags		= xfrm4_init_flags,
 79	.init_tempsel		= __xfrm4_init_tempsel,
 80	.init_temprop		= xfrm4_init_temprop,
 81	.output			= xfrm4_output,
 82	.output_finish		= xfrm4_output_finish,
 83	.extract_input		= xfrm4_extract_input,
 84	.extract_output		= xfrm4_extract_output,
 85	.transport_finish	= xfrm4_transport_finish,
 86	.local_error		= xfrm4_local_error,
 87};
 88
 89void __init xfrm4_state_init(void)
 90{
 91	xfrm_state_register_afinfo(&xfrm4_state_afinfo);
 92}
 93
 94#if 0
 95void __exit xfrm4_state_fini(void)
 96{
 97	xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
 98}
 99#endif  /*  0  */
100